612105405261 has 16 divisors (see below), whose sum is σ = 945869119488. Its totient is φ = 344848114800.

The previous prime is 612105405193. The next prime is 612105405349. The reversal of 612105405261 is 162504501216.

It is not a de Polignac number, because 612105405261 - 2⁷ = 612105405133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612105405061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205265245 + ... + 205268226.

It is an arithmetic number, because the mean of its divisors is an integer number (59116819968).

Almost surely, 2^612105405261 is an apocalyptic number.

It is an amenable number.

612105405261 is a deficient number, since it is larger than the sum of its proper divisors (333763714227).

612105405261 is a wasteful number, since it uses less digits than its factorization.

612105405261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410533552.

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 612105405261 its reverse (162504501216), we get a palindrome (774609906477).

It can be divided in two parts, 61210 and 5405261, that added together give a triangular number (5466471 = T₃₃₀₆).

The spelling of 612105405261 in words is "six hundred twelve billion, one hundred five million, four hundred five thousand, two hundred sixty-one".